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Production of eta and 3 pi mesons in the pd -> (HeX)-He-3 reaction at 1360 and 1450 MeV
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
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2010 (English)In: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 45, no 1, 11-21 p.Article in journal (Refereed) Published
Abstract [en]

The cross-sections of the pd -> He-3 eta, pd -> He-3 pi(0)pi(0)pi(0) and pd -> He-3 pi(+)pi(-)pi(0) reactions have been measured at the beam kinetic energies T-p = 1360 MeV and T-p = 1450 MeV using the CELSIUS/WASA detector setup. At both energies, the differential cross-section d sigma/d Omega of the eta meson in the pd -> He-3 eta reaction shows a strong forward-backward asymmetry in the CMS. The ratio between the pd -> He-3 pi(+)pi(-)pi(0) and pd -> He-3 pi(0)pi(0)pi(0) cross-sections has been analysed in terms of isospin amplitudes. The reconstructed invariant-mass distributions of the pi pi, He-3 pi and (3)He2 pi systems provide hints on the role of nucleon resonances in the 3 pi production process.

Place, publisher, year, edition, pages
2010. Vol. 45, no 1, 11-21 p.
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Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-136033DOI: 10.1140/epja/i2010-10981-3ISI: 000279369600002OAI: oai:DiVA.org:uu-136033DiVA: diva2:376080
Available from: 2010-12-09 Created: 2010-12-09 Last updated: 2017-12-11Bibliographically approved

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Schönning, KarinGeren, L.Kupsc, Andrzej

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Department of Physics and AstronomyThe Svedberg Laboratory
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